Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke300 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50
The ACQJ40X300-50 is a double-acting JIS compact cylinder featuring a 300mm full stroke and a 50mm adjustable extend window. An external M12x1.25 threaded stop with lock nut lets you fine-tune the extend end position on the machine, yielding a usable forward range of 250-300mm. The retract stroke remains completely unaffected by this adjustment. This long-stroke made-to-order variant exceeds the 100mm standard maximum for this bore size.
Because the piston area is unchanged, the output force is identical to a standard ACQ of the same bore. You get 628.3N push and 527.8N pull at 0.5MPa, scaling to 879.6N push at 0.7MPa, with a maximum push capacity of 128kgf at 1.0MPa. The body uses fixed NBR elastomer bumpers at each end for deceleration rather than adjustable air cushions, and includes sensor grooves, though this specific configuration ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 300 mm |
| Adjuster thread | M12×1.25 |
| Port size | PT1/8 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Rod thread | M8×1.25 (F) / M14×1.5 (B) |
Specifications follow the official AirTAC ACQJ datasheet. The adjustable stop shortens the EXTEND stroke only; the piston area — and therefore the force — is the same as a standard ACQ of this bore. Adjustable window options: 10/20/30/40/50/75/100 mm.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Force equals a standard ACQ of the same bore — the adjuster changes stroke length, not piston area. Actual usable force is lower due to friction; size with a safety margin.
Model Code: Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | Full stroke length in mm. |
| -0 | Adjustable window in mm (extend stroke can be shortened by up to this). |
| S / B | Magnet (S) / male-thread rod (B); omit for none / female thread. |
Thread: PT standard (G / NPT available). Related: ACQ (fixed stroke), ACQD (double rod), TACQ (guided / non-rotating).
Where the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50 Is Used
Machining Fixture Setup
Dial in the exact clamping reach on a CNC machining center during first-article inspection, shortening the extend stroke within the 250-300mm window without swapping hardware.
Product Changeover Stops
Adjust the end-of-stroke position on a packaging line when introducing a new carton size, using the external M12x1.25 stop to quickly set a new resting point.
Prototype Actuation Limits
Safely test trial end positions on a new assembly rig by limiting the forward extension, preventing crashes before finalizing the mechanical layout.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50 the Right Cylinder?
When sizing this 40mm bore, stepping down to a 32mm bore yields 402.1N push at 0.5MPa, while stepping up to a 50mm bore provides 981.8N push. If your application requires a fixed 300mm reach without on-site end-position tuning, a standard ACQ40X300 will suffice and avoids the adjuster overhang. To order, confirm the 40mm bore, 300mm full stroke, 50mm window, female M8x1.25 rod thread, and PT1/8 porting. Note that a plain ACQ-type cylinder will drift and lose its load on air loss; for fail-safe holding, specify an external rod lock or pilot-operated check valve.
Quick checklist
- ✓ Need on-machine end-position tuning?
- ✓ Full stroke and adjust window (mm)
- ✓ Force at your working pressure
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Lock the adjuster nut after setting the stop.
- check The stop limits the EXTEND stroke only.
- check Avoid side load on the short piston rod.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-50 FAQ
The usable extend range is 250-300mm (300mm full stroke minus the 50mm window). Force is identical to a standard ACQ40: 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128kgf at 1.0MPa.
An external threaded stop with a lock nut limits the extend stroke without changing piston area, so force remains unchanged. The retract stroke is unaffected. The cylinder uses fixed NBR elastomer bumpers at each end rather than adjustable air cushions. This model ships without a magnet, though the body retains sensor grooves for adding switches if needed.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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